SU1685481A1 - Method of cleaning aminoacids - Google Patents

Description

The invention relates to the field of electrochemical production, and specifically to the electrodialysis technology of chmino acids.

The purpose of the invention is to increase the degree of purification.

FIG. Figure 1 shows an electrodiali1 generator that implements the cleaning method, and flash 2 shows diagrams explaining the method.

The method is carried out as follows.

The initial solution containing neutral molecules, cationic and anionic forms of amino acids (AK + and AK), as well as mineral impurities, is fed into the chamber 1 of the electrodialysis demineralization formed by cationic and anion-exchange membranes 2 and 3 Adjacent chambers (alkaline 4 and acid 5) are limited bipolar membranes 6. When applying an electric field, the anions of mineral impurities and amino acids are transferred to adjacent chambers through anion-exchange 3 and their kationi — through the cation-exchange membrane 2, where the formation of acid and alkali occurs by generating

The bipolar membranes b of protopop and hydrocopy ions reach certain loncentration and alkali. The process of transferring the nousings of the .ICVOTU nosos by pressure | C, DIPP5, n / (h anion-exchange membrane acid around the anion transfer membrane anionic .i-amino acid into the cation membrane di J {lead, cation-exchange membrane alkali to thionic form of amino acid into anionic, after which these ions electrically remove the waste back to the demineralization chamber. The indicated concentrations are determined by (Fig. 2)

Example. The initial solution containing 10 g / l of amino acid (/ j alanine) and 5 g / l of mineral impurities circulates through the chambers 1 of the demineralization of an elec trolysis cell consisting of alternating membranes of the type MK-40 (3), ML 41 (4) and МЬ 3 (7) In acidic 5 and alkaline 4 K measures, the solution is not supplied with water in them is transferred through the membranes to the hydrate, the shell enters the ny and, as a result of diffusion (pp-kim electro-somatic concentration ensures maximum concentration of

WITH

about

00

ate

Ioo

ditch, the minimum consumption proc- essual needs, ipod; i t n; -. rnp, tr.1 pgku scheme. The residual content of mineral impurities in the solution being cleaned (C) is monitored; the amypoquinos yield is: u (N),; solutions about acid and chip-camera. The electric mode is a PPC Ashcade, voltage drop H.I e / b a mono link (3 cameras) S. (The summary data is presented at,: .7

From the course of curves 1 and 2 in figure 2 view,:. In the process of cleaning the solution, per cubic centimeter in acidic 5 and alkaline A chambers of an electro-dialyzer, cc / nm and alkali g: og -: i: n; . becoming a meme concern fmrpr.amni. PH values with rasporoy at oPeg. nt; target product to level; i.O / g | i.: ... .1, depending on the initial with low frequencies. . change in the Internet; ,: 5 alkaline chambers and 1.0 G, 1 q: vi -.,.: K .-- measures. Optimalpmn. (Neither the pH value is equal to II and -3. ..;.;. -m |., h pi: less than 1 and greater than 14 p;): ..-.); - ::; and op. not achieved, which is due to: - п:.: ч.; -; mi membranes, and at pH the pain is 3 i pi:;: m. 11 begins tangible L4ii: r; IN - .. un,. LOT1..1 through memoirs (cplg P1 th; i oii; chie chambers (krips 3). Kn-hchg;;; /,;,., 1 Mi 3 corresponds to the residual sparsfzhp p ..: VJC P.OJ ..: KJKIII: lots about 10 MI / l.

RESULG, OP.,;, OB. Half a me, ipl1

various electrical prgm.sg-i-oli contents of the source; nb razg.; i.; j, I: BII / IO. telstpuyut about h i about pa.s with ic gr; .mi, which determine the effective .. udsr; nich amino acids in the solution being cleaned, sti.iis associated with each other well-known pM pacTBOpoft in acid and alkaline chambers electrodialyzer Similar results were obtained when cleaning other amino acids.

From the data obtained from the series of experimental data, it can be seen that the proposed method for obtaining known results provides less loss of the target product.

The characteristics of the process of electrodillism purification of the amino acid (according to a series of experiments) are given in Table. one.

When cleaning up to the level of a very low loss method, there are practically no losses.

The method is based on the neutrality (at pH values of the i-isoelectric point) to transfer the amino acid molecule to cationic) fp; -, chu and k -: layer medium, and about anionic - and ce /; opt1 H ; and also the absence of this ability in pznl-minerals in the process of purification. The principal difference from the known method is that

B

eps N odtlchg-.yur r.t. not dpa of the type cpmep demineropp isiiui and concentrated n / n1, but three .p, (); ts ,, alkaline and k .k.aotpmr P1) with / - :; (in: two types are. p- i. ;, ;; ntsei;; i. | aHii; i - into acid chambers from chambers of d-mdr. Allocation of transfer-:;::;: (And: 1C; (; sir.,.,:,;,. "OGTIlnye mgsgi- rp.i. ij, 11 scch och yus: cations (through k -: -, i: (h; n -. M: m Km yony). VcflOf.HiO geek i gchnoi; i .1, .,.: ii ri; jii the backlog is degraded (, - .... ;; - :: a 1I h and;: and b. aah. At the same time, ufipa-uyup: h acidic and, pretpunltsl.l.t./ in kis-o and bristling chambers 1 h.;) aMiinoi-.il, lo ii .-; s. changes from pairs; CLK: mg Pocho / cP n Li anions, C (, t / I; GH2N R COO i

 , M; .

but ; ; but; .. -, and. ;; ka iroi, ie

I .; :-) N ATP. Y) H.-J.J4 - C-COOH. . ; uh-y mche h.jiipitiuienne elsktromi. . AND.; ° |: OP G.::; RITS. PROGIVOPO. SOUTHOO

(attack “t ;;; f ..,,: --ppg: ;; lizayiii), and ami-i: a: ....: l P cha: in; i.e. . : 0g / r; n .; dg-,. - .; cpr

 but . h / ,.):,.: values of pi solutions in: l gm s and g ;;; rg 11;,. chambers / yuktrodiu- / H, and oG junC4v-u a - ..;:; .noe sreblty-- f ;; - in K: h chypusomo o-it; xann3fi4 hold K.- M iXi o: odn-kta, ir, (o palesa-P1:;.; - 1 (. Ц | Gterioam-, s, iog-1 is the most doggy, T.; ai iso-reto ..

i-niche-jong. g. light characteristics of the process, ga .i / i.; Kipivv: .i3Hon purification of amines (igchot. unit:) abl.

one ;; ibopee olizky to the claimed he him- t; ,,. cleaning -: k.1iiookistov og mineral; -. npi-;.; cemi-medud of electrodialysis. PROCESS. -. is carried out at currents above the maximum value of 1 in a multi-chamber electrode - ln type. consisting of alternating v and hyo- and anion-exchange membranes, forming a 3yiouuix desalination chamber and a concentration | hn); 1i thick 0.45 mm. The resulting product contains at least 20–30 mg / l of ammonium cobalt, the yield of the amino acid in the cleaning process is 71–96%,

The main disadvantage of the known method is that its use is associated with significant losses of the microscopic ..-. Acid in the cleaning process.

Psg use of the claimed method then. nor receive any special benefits; Amino acids at minimum losses. X is ecologically pure and high. | . hypnosis; yo (speed) process.

3 about pmu l and inventions

C. Method of purification of amino acids from a minera: p - l: 1 - x impurities by electrodialysis in an electric dialdializer with alternating

anion exchange and cation exchange membranes, characterized in that. In order to increase the degree of purification, the process is conducted in an electrodialyzer equipped with bipolar membranes placed between each pair of anion exchange and cation-exchange membranes with kagion-exchange sides rotated towards the cathode, forming the initial flow-through measures formed

anion-exchange and cation-exchange membranes, stagnant alkaline chambers formed by bipolar and cation-membranous membranes, and fragile acid chambers formed by bipolar and anion-exchange membranes, and electrodialysis are carried out at initial pH in alkaline chamber 14, and in acidic 1 and finished at pH in neutral chamber 11 and in acid 3.

Amino acid

Voltage on I Aminoxy-electrodialysis yield,%

bargaining

2596

2598

2598

K A

TO

6

 6 Uc) coc Hb / ii pacmffop rfj -, 1

Table 1

Table 2

Specific energy j Residual co-costs. keeping mine- kWh / kg ratal amino acid j impurities in an amino acid solution, mg / l

0.3110

028.10

0.3510

ON

HE

V

N: /

: PH

10 Fi. 2

yuo woo su / l

Claims (1)

The method of purification of amino acids from mineral impurities by electrodialysis in an electrodialyzer with alternating anion-exchange and cation-exchange membranes, characterized in that, in order to increase the degree of purification, the process is carried out in an electrodialyzer equipped with bipolar membranes, 5 located between each pair of anion-exchange and cation-exchange membranes, cation-exchange sides cathode, with the formation of the original flow chambers formed by 10 anion-exchange and cation-exchange membranes, non-flow alkaline chambers er formed by bipolar and cation-exchange membranes, and weak acid chambers formed by bipolar and anion-exchange membranes, and electrodialysis are carried out at an initial pH in alkaline chamber 14, and in acid 1 and end at pH in alkaline chamber 11 and in acid 3.